src/main/java/org/takes/http/BkParallel.java
/*
* The MIT License (MIT)
*
* Copyright (c) 2014-2024 Yegor Bugayenko
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.takes.http;
import java.io.IOException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;
import lombok.EqualsAndHashCode;
/**
* Parallel back-end.
*
* <p>
* The class is immutable and thread-safe.
*
* @since 0.1
*/
@EqualsAndHashCode(callSuper = true)
public final class BkParallel extends BkWrap {
/**
* Ctor.
*
* @param back Original back
*/
public BkParallel(final Back back) {
this(back, Runtime.getRuntime().availableProcessors() << 2);
}
/**
* Ctor.
*
* @param back Original back
* @param threads Threads total
*/
public BkParallel(final Back back, final int threads) {
this(
back,
Executors.newFixedThreadPool(
threads,
new BkParallel.Threads()
)
);
}
/**
* Ctor.
*
* @param back Original back
* @param svc Executor service
* @since 0.9
*/
public BkParallel(final Back back, final ExecutorService svc) {
super(
socket -> svc.execute(
() -> {
try {
back.accept(socket);
} catch (final IOException ex) {
throw new IllegalStateException(
"Socket wasn't accepted by the back",
ex
);
}
}
)
);
}
/**
* Thread factory.
* @since 0.1
*/
private static final class Threads implements ThreadFactory {
/**
* Total threads created so far.
*/
private final AtomicInteger total = new AtomicInteger();
@Override
public Thread newThread(final Runnable runnable) {
final Thread thread = new Thread(runnable);
thread.setName(
String.format(
"%s-%d",
BkParallel.class.getSimpleName(),
this.total.getAndAdd(1)
)
);
return thread;
}
}
}